Book-cover



(No Model.)

J. DEHN. BooK COVER.

Patented DecI` 31 4 ANDREW E GRAHAM.PHOTDUTNQWASHINGTDKUU Nrrnn STATESATENT rricn.

JOHN DEIIN, OF CHICAGO, ILLINOIS.

BOOK-COVER.

A SPECIFICATION forming part of Letters Patent No. 552,280, datedDecember 31, 1895.

Application led February 1l, 1895. Serial No. 538,025. (No model.)

To @ZZ whom t may concern:

Be it known that I, JOHN DEHN, a citizen of the United States ofAmerica, residing at Chicago, in the county of Cook and State ofIllinois, have invented certain new and useful ImprovementsinBoolcCovers, of which the following is a specification.

My invention relates to certain improvements in removable book-covers,the purpose of the improvement being to make such covers easilyadjustable and detachable so that they can be quickly applied to anybook and at the same time adjusted to the same.

To such end the invention consists of certain features of constructionfully described below, and pointed out in the appended claims.

In the drawings, Figure 1 is a perspective showing one of my improvedcovers containing a book in its open position. Fig. 2 is a similar viewshowing the cover apart from the book. Fig. 3 is a section in the plane3 3 of Fig. 1. Fig. 4 is a detail view of a suitable clasp which Iprefer to use upon the cover. Fig. 5 is a detail of a leaf-holder shownin connection with said cover, and Figs. 6, 7, 8, and 9 are detail viewsof extensible clasps or clamps designed to hold the book firmly withinthe cover.

In the drawings, my cover is shown as consisting of side boards A B,respectively, each consisting of three portions side by side, a ct a2, bbb2. These portions are riveted firmly together, the central part of theintermediate portion being cut away to allow of the insertion oftheflexible back C, the same fitting into the boards loosely enough toslide freely back and forth. The portions of this back within the sideboards are each provided with two series of perforations c, and the sideboards each contain a pair of perforations CL3 53 the space betweenwhich is the same as the space between the two series of holes in theopposite ends of the back piece. The inner portions of the side boardsare cut away transversely beneath these holes, as shown clearly in Fig.2 at a4 b, and the groove formed is filled by a detachable cross-piece Dbearing two studs d d, properly located to enter the two holes in theside piece. Screws CZ are provided for securing the cross-piece I) inplace. The object of this arrangement is to hold the back piece Cinplace and yet permit of the extension of the same to the extent of thedistance between the holes.

These covers are intended for use upon books composed of loose papersrudely fastened together-as, for instance, they may be held together bya pin or rivet passing through them near one end, and in such a case theback piece C and plates H I are each provided with a hole through whichthe pin may project. A rivet is shown in the drawings, but it is notessential, as, in fact, the leaves may be entirely loose and separatefrom each other, such as statements, orders, receipts, &c. In order tosecure the leaves to the cover I provide a clamp which will be describedbelow. In Figs. 6, '7, 8, and 9 I show -four varieties of these clamps,the common feature of which is that they are all adjustable at both endsso that they may be tted upon as wide a range of books as the back pieceC.

The clamp shown in Fig. 6 consists of two cross-pieces E F, connected'attheir opposite ends by means of thumb-screws G G', so that they can bereadily applied to the back of the book and firmly clamped to the same,the screw giving quite a range of adjustment to different thicknesses ofbooks. Within the cross-pieces E F are Wider plates H I, turned at rightangles at the ends h c' to embrace the edges-of the book. These platesgive a greater bearing-surface for the cross-pieces E F and hold theback of the book in better shape. Fig. 7 shows a clamp differing merelyin the form of the lower cross-piece F', the object being to conceal theend of the screw. Fig. 8 shows a different form of screw, the sameconsisting of a nut J and a nut K, externally screw-threaded to iit thenut J and internally screw-threaded to fit a screw L. The screw Lengages the lower cross-piece F2 and the nut J the upper cross-piece.The advantage of this construction is that within a given lengthsubstantially double the limit of adjustment is obtained. In Fig. 9 twoscrews M N engage with a cross-piece E2 secured to the top cross-piece Eand are screw-threaded to iit in a cross-bar O, in which turns a nut P,

threaded to a screw Q, which engages with the lower cross-piece F2. Thisconstruction also gives a double range of adjustment.

The free ends of the side pieces of the cover are provided with aspring-clasp secured to one and provided with means of engagement withthe other. Fig. shows a clasp consisting of a barrel R screw-threadedinto the side piece A and having confined within it a coiled spring o',to which is secured a bolt fr having a head r2. The side piece B of thecover has a slot r3, which will allow this head to pass through it whenthe head is properly turned, but which prevents the return of the headwhen the latter is turned at right angles. The spring R is intended topermit of the necessary adjustment of the cover of the different sizesof book.

Fig. Li shows another form of spring, the same consisting of a doublecoil S, riveted within the side piece A at s and adapted to hook over ahook s', secured to the side piece B. Said spring is provided with abail s?, used as a convenient handle.

Upon the lower face of the upper cover A is pivoted a leaf-holder T, thesame shown as consisting of a wire bent into the form of a rectangularbail with inturned ends 15, the inner extremities of which are againinturned in the plane of the bail, as is seen in Fig. 5 at t2. Theseinturned ends are held beneath two spring-plates t3, detachably securedto the upper cover by means of screws t4. This enables the entire deviceto be detached from the upper cover, and, when broken or worn out,portions replaced by new pieces. The springplates tend to hold the bailT against the upper cover in either of two positions, one being thatshown in Fig. l and the other being upon the opposite sides of thespring-plates, said springs allowing, however, to yield to hold as l.The combination with the side pieces, A, B, of the back piece, C,containing the holes, c, c, the cross-bar, D, having the pins, (Z, d,and the screws, d, adapted to fasten the cross bar securely in place.

2. The combination with a detachable bool; cover of a back clampconsisting of the two cross-bars, E, F, provided with means for clampingthem firmly upon the book and the plates, H, I, substantially wider thanthe cross-bars, E, F, provided with the inturned ends, 71 i,substantially as described.

3. The combination in a book cover and with proper side pieces, a backpiece laterally adjustable with reference to the side pieces, of a backclamp adapted to fasten the cover to the book, said clamp consisting oftwo crossba'rs adj ustably secured together at both ends; substantiallyas described.

Ll. The combination with a detachable cover of a back clamp consistingof opposite cross pieces secured together at both ends by means ofscrew-adjusting devices consisting of a screw secured to onecross-piece, a nut internally threaded to said screw and turning in anintermediate cross-piece and a pair of screws connecting saidcross-piece with the opposite cross-bar; substantially as described.

5. The combination with an adjustable book cover, of the double spring,S, secured to one of the side pieces, a hook upon the opposite coveradapted to engage the opposite end of the spring and a convenient handlefor operating the same; substantially as described.

JOHN DENN.

fitnesses GHAs. O. SHERVEY, A. I. 1I. EBBEsEN.

